Attachment to air brake pressure retaining valves



Feb. 21, 1933. JOINER v 1,898,250

ATTACHMENT TO AIR BRAKE PRESSURE RETAINING VALVES Filed Sept. 28, 1931 gwumtov d zmsze L. Joine broken away. to: show. the closure; 7

Patented Feb. 21, 1933 UNITED;STATE-S1; PATEN-r OFFICE? SYLVESTERLJ L. J'OINER,. F SWEETWATER, .VTEXAS, ASSIGNOR OF. ONE-THIRD. TO

ALEXANDER..S. KENDRICK .AND ONIL-THIBD. T0. WALTER W.. DAVIS, .01. SWEET:

wnrnmmnxns.

ATTACHMENT"TO' AIR BRAKE.TPRESSURE RETAINING VALVES Application filed September 28, 1931'.

This invention relates to-an-attachmentzto air brake. .pressure 1 retaining valves.-

One object of the. inventionis to-provide an. attachment adaptable for connection with the. exhaust port of .a standard. air pressure brake retaining valve: which will efiectively prevent:the-.depositing of solidvmatter inthe port by insects and the: like.

Another object of thezinv-ention is to pro.- vide a simple inexpensive attachment which willallow the; air. to exhaust from the exhaust port of an:air brake pressure. retaining valve and also prevent the clogging :llpzQI stopp ng up ofthe exhaust port by insects andthe llke depositing foreign; matter therein.

With these and other objects in view the invention will Joe. more clearly i understood byreferring to the enclosed. drawings wheree 1 in Figure .1 is a side elevation-of a standard. air .brakespressure retaining :valvewith my, invention shown attached.. to .the' exhaust port' Fig. 2 is an enlarged vertical sectlonal v ew Fig. .3 is a transverse-sectional view takenonthe ]ines'3-3' of Fig. 2 looking in the d1- rection :of the arrows Fig.4; is a transverse sectional view. show inga modification of a closure; v

Fig-,5 is a transverseseotionalview taken; onthe lines ;5-T5 of. Fig. A: a

Fig. v6is a, vertical section of a further mod- .ification of. my invention 35 Fig. 7 is a transverse view takenron the lines 7..7 of Fig-6 lookinginthe-direction of: the-arrows; andw- Fig.5 is a transverse sectional view taken-.-

.onithe. lines 8-8-of.Fig. 6 looking inthe di-. 'rection of the .arrows.-

Referring .more particularly to the :drawings, a denotes a standard; air brake-pressure retaining valve having aninlet Z) for exhaust air from the tripletvalve at the braking sys tem of railroad-cars.andanexhaust port or opening 9..

vMyjnvention generally indicated at 1, is shown attached to-theexhaust port 0 of the air brake pressure retaining valve. The at taehmentzl consists of the. .hollow open ended,

% tflChQALfiS at 8, to the pocket 7 there is shown ering the open end 1710f the nipple and has Serial No.- 565,650.

nipple having an angular portion 2,.and a substantially vertical portion 3. 'At the outer end of the angular portion there are 7 provided screw threads 4 for attachment with" the exhaust port 0. there is provided a wrench receiving portion Adjacent the outer end 5 5 forming a shoulder 6. I The other end of the-nipple 1 has attached thereto; in any suitable manner, a pocket; :7. Piv'otally at-wv 6 a cl0sure 9. The closurebeing'pivotedon a plntle 10 which extends throughthe sides 11. of the pocket and also throughears 12 of. the vclosure. Theolosur'e consists of a sub stantially round portion '18 and an extension the extensionof the iclosure, as shown at 15; I Arrangedin .the pocket adjacent its' outer V endthere is provided a. compression spring '16" 1 which" normallyi maintains :the closure: 9 in -7 engagementwith the end 17 of: the hollow nipple-fv In .themodification of my'invention shown in Figs. 4 and 5, there is prow' dedthe nipple. 1, consisting of; the angular'rportion :2 and the substantiallyvertical portion 3. Adjacentithe louter open endofthez hollow nipple" 171there is provided a lug 18' which extends 2. laterallyfrom the side of the vertical portion of the nipple 3.: Thislateral extension is provided with an opening 19. Pivotal'lyi mounted by means of thepintle 20 thereis shown a closure 21... This closure consists% of a substantially round portion 22'for cov integral therewith. an extension 23. This ex-H tension preferablyrhas. integral therewithii suitable ears 24. These ears are provided with openings25 to. receive the pintle:20 which extends throughthe ears and'through the 'ope ning19 in the lug 18, thereby :fornr ing a pivotalrmounting for :the closure '21:". At'the outer end of the extension 23thereis shown a weight 26:. This weight normally'w tends :tornaintain the closure122 in engage.-

ment with the? open end 1? of the hollow nip-1r plea While theiweight 26 has been shown at-' v tached; to 1 the extension 23 :in any suitable manner as-at 27,. it is to be understood that.

6 14; The? cars 12 are preferably integral with:

the; extension-itself 111lght/1beul11CI'62tSGd in10o width and serve the same purpose of the weight, that is, to normally maintain the closure 22 in engagement with the open end 17 of the nipple.

In a modification of the invention shown in Figs. 6, 7 and 8 there is provided a nipple 1 with the angular portion 2 and the substantially verticalportion 3 having the screw threads 4: at the upper end of the angular portion for engagement with the exhaust port 0. The angular portion 1 of the modification shown in Fig. 6 is of substantially less diameter than the vertical portion 3. This angular portion provides a restricted passageway for the exhaust air from the air brake pressure retaining valve. The vertical portion of the nipple is substantially twice the diameter of the angular portion 1 and is preferably of circular formation. In the vertical portion of the nipple there is shown a flap valve 28 which is pivotally mounted on the pintle 29, the pintle 29 being secured in the vertical portion at opposite sides, as at 30. It will be seen that the portion of the flap valve 31 extends over the passageway 32 formed by the angular portion of the nipple and normally closes this passageway. The opposite side of the flap valve 32 extends into a pocket 33 formed in the vert cal portion of the nipple and is provided preferably on its bottom side with a weight 34. The side wall of the vertical portion of the nipple is provided with a lug 35 forming a stop for the downward movement of the portion 32 of the flap valve. At the outer end 36 of the vertical portion of the nipple there may be provided a reticulated screen closure 37 secured to the nipple in any suitable manner, as at 38.

In the invention as disclosed in Figs. 1 to 5, it will be seen that I have provided a pivoted closure which is normally maintained in engagement with the open end of the nipple, thereby closing the same. I have shown a spring and weight which normally maintains this closure in its closed position. When the air exhausts from the exhaust port 0 into the nipple it will be sufficient to open the closure to allow the air to exhaust from the nipple and after the air has exhausted from the nipple the spring and weight will serve to automatically close the open end of the nipple.

In the modification shown in Fig. 6 it will be seen that the incoming exhaust air from the port 0 to the passageway 32 engages only one portion of the flap valve and is sufficient to rock the flap valve from the full line position shown in Fig. 6 to the dotted line position shown therein, which enables the air to exhaust through the screen closure at the lower portion of the nipple. The weight on the flap valve serves to normally close the passageway 32 and the pocket above the weighted port-ion of the valve is adapted to receive this portion of the valve when the exhaust air contacts with the other side of the flap valve.

The primary purpose of my invention has been to provide a simple and inexpensive attachment to the exhaust port of a standard air pressure retaining valve which will absolutely prevent insects from depositing solid matter, or other foreign matter in the exhaust opening of the valve but which will allow of the exhaust air to be exhausted through the nipple to the atmosphere and after such air has been exhausted the open end of the nipple will be automatically closed.

There has been considerable difficulty encountered in that, the exhaust ports of standard air brake pressure retaining valves are usually left open and when the cars remain on a siding for any length of time insects, such as sand daubers, deposit dirt and other foreign matter in the exhaust port thereby preventing proper exhaustion of the air therefrom, and in some instances causing serious accidents and a detrimental effects to the braking equipment of railway cars.

From the foregoing it will be seen that I have overcome this serious disadvantage and have provided an attachment which Will prevent the clogging up of the exhaust port of the standard air brake pressure retaining valve.

It will be understood that various changes in the form, proportion, and minor details of construction, within the scope of the claims, may be resorted to without departing from the spirit of the invention or sacrificing any of the advantages thereof.

lVhat is claimed is:

1. An attachment for air brake pressure retaining valves comprising a hollow nipple having an angular and vertical portion, said angular portion being adapted to be attached to the exhaust port of said valve, the said vertical portion being provided at its extreme open end with a pivoted spring pressed closure normally closed to prevent insects and the like from depositing solid matter in said exhaust port, but adapted to be opened by the exhaust of air and other foreign matter from said port.

2. An attachment for air brake pressure retaining valves comprising a hollow nipple one end of which is adapted to be attached to the exhaust port of said valve, a pivoted closure for the other end of the nipple, and means for maintaining said pivoted closure in its normal closed position to prevent insects and the like from depositing solid matter in said exhaust port, but allowing opening of said closure by the exhaust of air and other foreign matter from said port.

3. An attachment for air brake pressure retaining valves comprising a hollow nipple having an angular and vertical portion, said angular portion being adapted to be attached to the exhaust port of said valve, a pivoted closure attached to the outer end of the vertical portion, and a weight attached to said closure to normally maintain the same in closed position to prevent foreign matter from being deposited in said port but allowing opening of said closure by the exhaust of air and other foreign matter from said port.

4. An attachment for air brake pressure retaining valves comprising a hollow nipple one end of which is adapted to be attached to the exhaust port of said valve, a pivoted closure attached to and having an extension projecting beyond the periphery of the other end of said nipple, and a spring acting on said extension to normally maintain the closure in closed position to prevent foreign matter from being deposited in said port but allowing opening of said clos'ure by the exhaust of air and other foreign matter from said port.

5. An attachment for air brake pressure retaining valves comprising a hollow nipple provided with an enlarged valve chamber and an air exhaust passage of less diameter than said chamber adapted for attachment with the exhaust opening of said valve, a valve mounted in said chamber, means for normally maintaining said valve in closed position to prevent insects and the like from depositing foreign matter in said port, but allowing opening of said valve bv the exhaust of air and other foreign matter from said port.

6. An attachment for air brake pressure retaining valves comprising a hollow nipple provided with a valve chamber and an air exhaust passage adapted for attachment with the exhaust opening of said valve, said valve chamber being of a larger diameter than said exhaust passage, a valve pivotally mounted in said valve chamber and having a portion extending over said exhaust passage forming a closure, the other portion of the valve being weighted, and means in said valve chamber to limit the downward movement of the weighted portion of the valve, whereby one port-ion of the pivoted valve normally closes said exhaust passage to prevent insects and the like from depositing solid matter in said port but allowing said valve to be opened by the exhaust air from said port through said passage.

7. The combination with an air brake retaining valve having an exhaust port, of a hollow nipple one end of which is adapted to be attached to said port, and having adjacent its other end a lug extending laterally therefrom, a closure pivoted to said lug, a weight on said closure to maintain the same in engagement with the said other end of the nipple to prevent insects and the like from -:ie positing solid matter in said exhaust port but allowing said closure to be opened by the exhaust air from said port.

8. In combination with an exhaust port of an air brake retaining valve, of a hollow nipple having an angular and vertical portion, said angular portion being adapted to be attached to the exhaust port of said valve, said vertical portion being provided adjacent its open end with an integral, laterally extending lug, a clos'ure for the open end of the nipple, said closure being pivoted to the said lug and having a weighted extension which normally maintains the closure in engagement with the outer end of the nip le to prevent insects and the like from depositing solid matter in said exhaust port, but allowing opening of said closure by the exhaust air and other foreign matter from said port.

In testimony whereof, I afiix my signature this 26th day of September, 1931.

SYLVESTER L. JOINER. 

